Complete the CarMuseum class below so that it implements the given
Measurable interface. Your tasks are as follows:
Modify the CarMuseum class to implement the Measurable interface.
In the constructor of CarMuseum, process the input string, and add unique cars to the
arraylist (do not add duplicates).
Implement the method in Measurable within CarMuseum to return the count of cars
in the museum.
For example, if the input string is "1949 Ford,1943 Studebaker,1950 Chevrolet,1948 Pontiac,1949 Ford,1944 Pontiac,1949 Studebaker", then
the getMeasure method of the CarMuseum class should return 6.0.